Visit all the continents:   North America, South America, Europe, Asia, Africa, Australia, Antarctica.

Specific places:   Hawaii, New Zealand, Australia, Antarctica, Iceland, Alaska, Egypt.

Hanglide.

Watch an active volcano.

Learn to surf and/or windsurf.

Buy a hot dog from a street vendor in downtown New York City.

Dinosaur hunting in Mongolia.

Do everything there is to do at Star Trek:   The Experience in Las Vegas.

See the curvature of the Earth from space. Full orbit is preferable, but a few minutes in low-Earth orbit is good enough for now.

Search for meteorites in Antarctica.

Experience an earthquake.

See an entire galaxy through a telescope with my own eyes.

Thoroughly understand Fourier Transforms.

Write and publish a book.

Go whitewater rafting down the Colorado.

Parasailing!